
Moreover, the Karush-Kuhn-Tucker (KKT) conditions hold [1]}: if \(w^*\)  is a local minimizer of (REF ), then \(w^* \in \mathcal {Z}\) , where
\(\mathcal {Z}:= \lbrace  w\in C : 0 \in - \nabla \ell (w) - N_{C}(w)\rbrace  \, .\) 
